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Bug 1744415 - Backport support for count cache flush Spectre v2 mitigation [slow train]
Summary: Backport support for count cache flush Spectre v2 mitigation [slow train]
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: qemu-kvm
Version: 8.1
Hardware: ppc64le
OS: Linux
unspecified
urgent
Target Milestone: rc
: 8.1
Assignee: Sam Bobroff (IBM)
QA Contact: Yihuang Yu
URL:
Whiteboard:
Depends On:
Blocks: 1624641
TreeView+ depends on / blocked
 
Reported: 2019-08-22 06:49 UTC by Sam Bobroff (IBM)
Modified: 2019-11-05 20:51 UTC (History)
16 users (show)

Fixed In Version: qemu-kvm-2.12.0-86.module+el8.1.0+4146+4ed2d185
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-11-05 20:51:11 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
IBM Linux Technology Center 181308 0 None None None 2019-09-05 02:02:42 UTC
Red Hat Product Errata RHSA-2019:3345 0 None None None 2019-11-05 20:51:39 UTC

Description Sam Bobroff (IBM) 2019-08-22 06:49:03 UTC 
Backport support for the QEMU machine option 'cap-ibs=workaround'.
Comment 6 Laurent Vivier 2019-08-29 07:42:59 UTC 
QE,

when you will verify this BZ, please check the migration of pseries-rhel7.6.0 machine type between RHEL-7.6.0 and RHEL-8.1.0 works well.
Comment 11 Yihuang Yu 2019-09-05 02:55:26 UTC 
migration test:
RHEL8.1 host:
kernel version: 4.18.0-141.el8.ppc64le
qemu version: qemu-kvm-2.12.0-86.module+el8.1.0+4146+4ed2d185.ppc64le

RHEL7.6 host:
kernel version: 3.10.0-957.27.2.el7.ppc64le
qemu version: qemu-kvm-rhev-2.12.0-18.el7_6.7.ppc64le

guest: RHEL7.7 kernel-3.10.0-1062.1.1.el7.ppc64le

src qemu command:
/usr/libexec/qemu-kvm     -name 'avocado-vt-vm1'     -machine pseries-rhel7.6.0      -nodefaults     -device VGA,bus=pci.0,addr=0x2      -chardev socket,id=qmp_id_qmpmonitor1,path=/var/tmp/monitor-qmpmonitor1,server,nowait     -mon chardev=qmp_id_qmpmonitor1,mode=control      -chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/monitor-catch_monitor,server,nowait     -mon chardev=qmp_id_catch_monitor,mode=control      -chardev socket,id=serial_id_serial0,path=/var/tmp/serial-serial0,server,nowait     -device spapr-vty,reg=0x30000000,chardev=serial_id_serial0     -device qemu-xhci,id=usb1,bus=pci.0,addr=0x3     -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0,addr=0x4     -drive id=drive_image1,if=none,snapshot=off,aio=threads,cache=none,format=qcow2,file=/home/share/rhel77-ppc64le-virtio-scsi.qcow2     -device scsi-hd,id=image1,drive=drive_image1     -device virtio-net-pci,mac=9a:a1:a2:a3:a4:a5,id=idz44VEg,vectors=4,netdev=idjHoD0w,bus=pci.0,addr=0x5      -netdev tap,id=idjHoD0w,vhost=on     -m 8192      -smp 4,maxcpus=4,cores=2,threads=1,sockets=2     -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1      -vnc :0      -rtc base=utc,clock=host      -boot order=cdn,once=c,menu=off,strict=off     -enable-kvm     -monitor stdio

dst qemu command:
/usr/libexec/qemu-kvm     -name 'avocado-vt-vm1'     -machine pseries-rhel7.6.0      -nodefaults     -device VGA,bus=pci.0,addr=0x2      -chardev socket,id=qmp_id_qmpmonitor1,path=/var/tmp/monitor-qmpmonitor1,server,nowait     -mon chardev=qmp_id_qmpmonitor1,mode=control      -chardev socket,id=qmp_id_catch_monitor,path=/var/tmp/monitor-catch_monitor,server,nowait     -mon chardev=qmp_id_catch_monitor,mode=control      -chardev socket,id=serial_id_serial0,path=/var/tmp/serial-serial0,server,nowait     -device spapr-vty,reg=0x30000000,chardev=serial_id_serial0     -device qemu-xhci,id=usb1,bus=pci.0,addr=0x3     -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0,addr=0x4     -drive id=drive_image1,if=none,snapshot=off,aio=threads,cache=none,format=qcow2,file=/home/share/rhel77-ppc64le-virtio-scsi.qcow2     -device scsi-hd,id=image1,drive=drive_image1     -device virtio-net-pci,mac=9a:a1:a2:a3:a4:a5,id=idz44VEg,vectors=4,netdev=idjHoD0w,bus=pci.0,addr=0x5      -netdev tap,id=idjHoD0w,vhost=on     -m 8192      -smp 4,maxcpus=4,cores=2,threads=1,sockets=2     -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1      -vnc :0      -rtc base=utc,clock=host      -boot order=cdn,once=c,menu=off,strict=off     -enable-kvm     -monitor stdio -incoming tcp:0:5200

I tested the migration between RHEL8.1 and RHEL7.6 (RHEL8.1 <-> RHEL7.6), can migrate successfully.
Comment 12 Yihuang Yu 2019-09-05 03:01:58 UTC 
Part 1:
Acceptance Testing for qemu-kvm-2.12.0-86.module+el8.1.0+4146+4ed2d185:
Result: PASS as no Critical Regression or TestBlocker found

Test Environment:
Host Distro: RHEL-8.1.0-20190903.1 BaseOS ppc64le
Host Kernel: kernel-4.18.0-141.el8.ppc64le
Qemu-kvm: qemu-kvm-2.12.0-86.module+el8.1.0+4146+4ed2d185.ppc64le
SLOF: SLOF-20171214-6.gitfa98132.module+el8.1.0+4066+0f1aadab.noarch

Results Analysis:
From 108 tests executed, 103 passed and 0 warned - success rate of 95.37% (excluding SKIP and CANCEL)
5 cases failed by the automated script issue

New bugs(0):
Existing bugs(0):

Result link:
http://10.0.136.47/3764259/results.html

Part 2:
pseries-rhel7.6.0.cap-sbbc=string (Speculation Barrier Bounds Checking (broken, workaround, fixed))
pseries-rhel7.6.0.cap-ibs=string (Indirect Branch Speculation (broken, workaround, fixed-ibs,fixed-ccd, fixed-na))
pseries-rhel7.6.0.cap-cfpc=string (Cache Flush on Privilege Change (broken, workaround, fixed))

# /usr/libexec/qemu-kvm -M pseries-rhel7.6.0
VNC server running on ::1:5900

# /usr/libexec/qemu-kvm -M pseries-rhel7.6.0,cap-sbbc=workaround,cap-ibs=workaround,cap-cfpc=workaround
VNC server running on ::1:5900

# /usr/libexec/qemu-kvm -M pseries-rhel7.6.0,cap-ibs=fixed-ccd
VNC server running on ::1:5900
Comment 13 Yihuang Yu 2019-09-05 03:07:52 UTC 
According to comment 11 and comment 12, change bug status to 'VERIFIED'
Comment 15 errata-xmlrpc 2019-11-05 20:51:11 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:3345
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